Check out Dan Kimball’s book They like Jesus but not the Church (Grand Rapids: Zondervan, 2007), David Kinnaman and Gabe Lyons', unChristian (Grand Rapids, USA: Baker Books, 2007) and the Adventist Review article “They Love Jesus, They Don’t Love the Church”. The Review article gives an introduction – but a thoughtful church planter or leader will want to read Kimball and Kinnaman’s books.